Tube Expansion Process for Bonding Copper Tubes to Aluminum Fins in Fin–Tube Coils
<p> The tube expansion (expand) process used to bond copper tubes to aluminum fins in fin–tube coils is one of the critical manufacturing operations in heat exchanger production. The primary objective of this process is to create a stable mechanical and thermal contact between the tube and the fin such that thermal conductivity between the inner tube surface and fin surface is maximized, while ensuring sufficient mechanical strength and structural cyclic durability.
